I find it a bit weird too, to be honest. I've driven and overdriven an MX5 on slicks, and it's very predictable and easy to drive, even if overdriven. Yes, you can spin it, but in those cases you know why, unlike in iRacing (last time I tried, been a while). I had so many unexplainable spins in the MX5, especially under braking, it just feels like the brake balance is way too far rear or something. In rF2, AC and LFS you usually understand why you spin, but the iR spins seem unprovoked to me. Put me off the game, really.